In recent years, fossil energy consumption has increased because of economic growth and this has led to carbon dioxide emissions and environmental crises.  Governments struggle to solve this problem by appropriate policies such as green or environmental tax policies. This policy is based on costs and can control pollution and increase renewable energy consumption as a substitute for fossil ener...

a simple, sensitive and selective method for solvent extraction and spectrophotemetric determination of lanthanum (ii) europium (iii), and cerium (iii) is described , the rare earth metals are extracted into chloroform solution of n-phenylbenzohydroxamic acid (pbha) at ph 9-10 various parameters are studied to optimize the extraction conditions. the molar absorptivity is found to increase from ...

Since the liquidity shortage has some undesirable consequences for banks, the evaluation of different strategies of providing liquidity is very important. In normal market conditions, there are plenty of adjustment strategies available for banks which allow them to have higher liquid assets when they face higher payment obligations. This paper mainly focuses on three strategies of liquidity man...

in this thesis, we consider a mathematical model of cancer with completely unknown parameters. we study the stability of critical points which are biologically admissible. then we consider a control on the system and introduce situations at which solutions are attracted to critical points and so the cancer disease has auto healing. the lyapunov stability method is used for estimating the un...

the present research has been deducted from a provincial research project which aims at determining the relationship of variables of variables of occupational self-concept, intelligence beliefs and metacognitive with entrepreneurship among the students of payame noor university of kurdistan. the volume of the samples was 1080 students (576 female and 504 male students). the research methodology...